Added introductory tables to Chrome apps APIs.

chrome/common/extensions/docs/templates/intros/mediaGalleries.html

Index: chrome/common/extensions/docs/templates/intros/mediaGalleries.html
diff --git a/chrome/common/extensions/docs/templates/intros/mediaGalleries.html b/chrome/common/extensions/docs/templates/intros/mediaGalleries.html
index 892d9f21e43a3ab135c5458dc954ee2e939149cf..e34f5959fc249fd1afe8c80a7693e28c7969a767 100644
--- a/chrome/common/extensions/docs/templates/intros/mediaGalleries.html
+++ b/chrome/common/extensions/docs/templates/intros/mediaGalleries.html
@@ -1,7 +1,32 @@
-<p>
-The media galleries API allows you to access media files (images,
-video, audio) from the user's local disks (with the user's consent).
-</p>
+<table class="intro">
+  <tr>
+    <th scope="col"></th>
+    <th scope="col"></th>
+  </tr>
+  <tr>
+    <td><strong>Description:</strong></td>
+    <td>Use the <code>chrome.mediaGalleries</code> API
+    to access media files (images, video, audio)
+    from the user's local disks (with the user's consent).</td>
+  </tr>
+  <tr>
+    <td><strong>Availability:</strong></td>
+    <td>Google Chrome 23</td>
+  </tr>
+  <tr>
+    <td><strong>Permissions:</strong></td>
+    <td><code>"mediaGalleries": ["read"]</code>,
+    <code>"mediaGalleries": ["read", "allAutoDetected"]</code><br>
+    See <a href="#manifest">Manifest</a> below
+    for more information.</td>
+  </tr>
+  <tr>
+    <td><strong>Learn more:</strong></td>
+    <td><a href="https://developers.google.com/live/shows/10479832/">Chrome Office Hours: The Media Galleries API</a></td>
+  </tr>
+</table>
+
+<h2 id="usage">Usage</h2>
 
 <p>
 Using the API, you can prompt the user for permission to access the media